Just trying to add an index for # of thanks to the post table so it doesn't have to table scan through 4.5 million rows every time. This will probably slow things down while it creates the index.
EDIT: Now that I think about it that's a baaaad idea at this point, it'll try and create a copy of the post table.. I'd have to take the forum offline for who knows how many hours to add that index. Hm...